Recent content by mrbill

Hi Folks: I took apart another identical motor that had also been run into high temperatures and discovered that it, too, appears to have less Statorade in the stator-magnet gap. While both motors were well-sealed, using a formable gasket of the type used to seal oil pans with automobile...

Since I requested this enhancement to the temperature parameter configuration, I have made some further discoveries. For several years on all of my motors I have been using these NTC thermistors with an apparent beta of 2700. (Since my calibration table included in a prior post was generated...

Any chance you could in some future release parameter-ize the NTC temperature sensor data by allowing the user to enter the resistance at 20C, beta, and optionally, the pull-up resistor value? This would allow for most or all varieties of NTC sensors.

Hi amberwolf: Thanks for the reference. I plugged in a bunch of different value off my worksheet, and I get a beta between 2600 and 2800--my data are a bit noisy. Unfortunately these figures are a ways off the two available parameters in the 3.2b2 firmware: beta = 3450 or 3900. I suppose...

Hi Folks: I recently updated my CA3 firmware to the latest beta version 3.2b2. Oddly, I saw no announcement of either this beta or the prior on this thread. Most of the changes add different options and modes for regeneration (motor braking) implementation. One of the changes I discovered...

Hi P3yot3: Glad to hear you're up and running and that Grin has their firmware repository accessible again.

I just did a quick check and was able to download two beta firmwares from ebikes.ca. So, I would say that you probably still have a network glitch somewhere in your system and that it is NOT an ebikes.ca being offline problem.

Hi Chalo, good to hear from (and see) you. That visit was almost six years ago! Time flies. I haven't been posting much lately to E-S as I've been very happy with my current e-bike systems--current issue excepted--and have been mostly out there enjoying the riding, doing routine maintenance...

I know that most cheap USB chargers are of marginal quality. But, since I'm only working with a system voltage of around 50Vdc I figure a failure of the sort anticipated by the makers of those videos is unlikely. I tried using the "Turbo" charger that came with my phone. Plugged into the wall...

Hi Amberwolf: Thanks for your reply. I've built a USB charger using an old USB socket and a QST 3A DC converter of the type sold by EM3EV and others a few years back, but that only produced at most about 300 mA, and that was after following the instructions to short the data wires or whatever...

Hi Folks: Does anyone know of a USB charger that will push at least 1 Amp when its input is hooked to a typical e-bike battery, say 20-100 VDC (or if that's asking too much, then 44-60 VDC)? For the last few years I've been using some cheap 120/240 VAC USB chargers that function as a charger...

I have the same problem: Coast down a hill on a road with a dip at the bottom followed by a climb, and the bike speed drops way below the speed limit before motor power kicks in. Using firmware version 3.12 I recently spent some time trying to improve the speed regulation when transitioning...

Thanks, Justin, for acknowledging this particular and peculiar usage case. The local public lands managers in my area are investigating the possibility of allowing on some of their trails, perhaps on a trial basis, "Class 1" e-bikes. In preparation of this I'm dusting off my Class 1 or "Legal"...

An 8v drop is too much over the winter under such storage conditions, unless the BMS is defective. If you have one of the Bluetooth BMS in the EM3ev battery, check the cells for good health. Then I'd contact EM3ev to get advice. If they are unable to help, you'll have to open up the battery...

Unfortunately, I'm already using the Aux Pot as a power limit control and the Aux Digital as a graded speed limit control. My solution for now is simply not to use the "Legal" mode where my throttle is disabled at any speed unless I'm pedaling, unless I have reason to believe I am likely to be...